If you are tired of running out of propane when grilling, add a propane tank measure to your Grill. Watch as Lou Manfredini shows you GasWatch, a propane tank scale that measures the level of propane in your tank. The bluetooth interface which connects to your smart phone and helps you monitor the level of your tank through your smartphone GasWatch App. It also gives an alarm when the propane level is low. GasWatch is not waterproof. Please keep the scale and display out of rain, snow and do not submerge GasWatch in any type of liquid. Always read the manufacturers instructions before using this or any product.